BIOS242, Week 3-OL Name:
Steps of Gram Staining
Bacteria containing thick cell
wall
peptidoglycan
Bacteria containing thin cell
wall (LPS)
Plasma membrane
Crystal violet treatment
lodine
Decolorization
Safranin
3. A fellow student showed you a gram stained slide where cells containing thick cell walls were

This is due ! matching pairs of chromosomes from parents are called a. homologous chromosomes b. heterozygous chromosomes c. herterogenes d. homologous bands

How does a lytic infection differ from a lysogenic infection?

Keeping in mind the life cycle of bacteriophages, consider the following problem: during the reproductive cycle of a temperate bacteriophage, the viral dna inserts into the bacterial chromosome where the resultant prophage behaves much like a trojan horse. it can remain quiescent, or it can become lytic and initiate a burst of progeny viruses. several operons maintain the prophage state by interacting with a repressor that keeps the lytic cycle in check. insults (ultraviolet light, for example) to the bacterial cell lead to a partial breakdown of the repressor, which in turn causes the production of enzymes involved in the lytic cycle. as stated in this simple form, would you consider this system of regulation to be operating under positive or negative control?